Current Mercury Marine® Engines Outboard FourStroke 40 4-Cylinder FourStroke 40 4-Cylinder

2025 Mercury Marine® FourStroke 40 4-Cylinder Base

2025 Mercury Marine® FourStroke 40 4-Cylinder Base

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  • Year 2025
  • Make Mercury Marine®
  • Model FourStroke 40 4-Cylinder
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2025 Mercury Marine® FourStroke 40 4-Cylinder Base

2025 Mercury Marine® FourStroke 40 4-Cylinder Base

  • Year 2025
  • Manufacturer Mercury Marine®
  • Model Name FourStroke 40 4-Cylinder
  • Trim Name Base
  • Generic Type (Primary) Four Stroke
  • Engine Power 40 hp (30 kW)
  • Engine Type Inline 4
  • Displacement 60.8 CID (995 CC)
  • Throttle Full: 5500-6000 RPM
  • Oil Type Recommended: Mercury FourStroke 25W40 Marine Oil
  • Gear Ratio (Primary) 2.33:1 | Shift: F-N-R
  • Emissions CARB star rating: 3
  • Bore 2.56" (65 mm)
  • Stroke 2.95" (75 mm)
  • Ignition ECM 07 Digital Inductive
  • Steering Big Tiller/Remote
  • Cooling Water-cooled with thermostat
  • Exhaust Through prop

2025 Mercury Marine® FourStroke 40 4-Cylinder

Held to a Higher Standard.

There are plenty of good reasons these outboards rule the water. Start with no-worry reliability. More low-end torque for excellent acceleration. Increased fuel economy and outstanding overall performance. Enhanced fuel injection (EFI models) for boosted efficiency. A robust electrical system with a high-output alternator to keep batteries charged and fishing electronics humming. They have everything you need, and nothing you don't.

High-displacement, four-cylinder, single-overhead-cam design delivers optimum power and a smooth ride. Great for aluminum tiller, aluminum console, inflatable rigid hull (RIB) and soft hull, watersports, and fish & ski boats.

Engine

Engine Power 40 hp (30 kW)
Engine Type Inline 4
Displacement 60.8 CID (995 CC)
Throttle Full: 5500-6000 RPM
Oil Type Recommended: Mercury FourStroke 25W40 Marine Oil
Gear Ratio (Primary) 2.33:1 | Shift: F-N-R
Emissions CARB star rating: 3
Bore 2.56" (65 mm)
Stroke 2.95" (75 mm)
Ignition ECM 07 Digital Inductive
Steering Big Tiller/Remote
Cooling Water-cooled with thermostat
Exhaust Through prop

Operational

Operating Conditions Shallow water trim range: 20°

Electric

Alternator 18 amp (226 watt)
Starter Electric (turn-key)

Fuel System

Fuel System Induction: 2 valves per cylinder, single overhead cam (SOHC) | Electronic Fuel Injection (EFI)
Fuel Type Recommended: 87 octane / up to 10% ethanol

Dimensions

Length Shaft: 20" (508 mm)

Weights

Dry Weight Lightest model available: 260 lbs (118 kg)

Features

Features Engine protection operator warning system: SmartCraft Engine Guardian | Compatible with SmartCraft digital technology: Yes | Trim system: Gas assist/ Power Tilt/ Power Trim

Color

Colors Phantom Black

Product Photography